在mailSettings应用程序中在App.Config中保存到.net

Question

我正试图从windows窗体保存到app.config中的下列设置

<system.net>
  <mailSettings>
    <smtp from="restore@example.com">
     <network host="smtp" port="25" defaultCredentials="true"/>
    </smtp>
  </mailSettings>
</system.net>

我试图使用下面的代码来设置它，但是我得到的错误是配置是只读的。

private void SaveMailSettings()
{
    var smtpSection = ConfigurationManager.GetSection("system.net/mailSettings/smtp") as SmtpSection;
    try
    {
        if (smtpSection == null) return;
        smtpSection.Network.Host = txtSmtpHost.Text;
        smtpSection.Network.Port = Convert.ToInt32(txtSmtpPort.Text);
        smtpSection.From = txtSmtpFrom.Text;
        if (smtpSection.Network.UserName != null) smtpSection.Network.UserName = txtSmtpUserName.Text;
        if (smtpSection.Network.Password != null) smtpSection.Network.Password = txtSmtpPassword.Text;
        Logger.Log(string.Format("Host: {0}, Port: {1}, From: {2}, UserName: {3}, Password: {4}", smtpSection.Network.Host, smtpSection.Network.Port, smtpSection.Network.UserName, smtpSection.Network.Password), "INFO");
     }
     catch (Exception ex)
     {
         Logger.Log(ex.Message, "ERROR:");
     }
}

有什么方法可以更新App.Config文件mailSettings吗？

Answer 1

您不能通过ConfigurationManager.GetSection编辑配置文件。

您应该打开文件并进行更改并保存该文件。

注意:不要在调试模式下对此进行测试。我不知道为什么在调试模式下更改不保存。但是，当正常运行.exe文件时，保存的.文件更改。

var webConfig = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var settings =(MailSettingsSectionGroup)webConfig.GetSectionGroup("system.net/mailSettings");
webConfig.AppSettings.Settings["test"].Value = "asdad";
SmtpSection smtp = settings.Smtp;
SmtpNetworkElement net = smtp.Network;
net.Port = 2005;
net.Host = "localhostEditedEdited";
webConfig.Save(ConfigurationSaveMode.Modified);